缅甸某区块上上新统沉积演化及油气勘探意义
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摘要
为评价研究区的油气勘探潜力,指明下一步油气勘探方向,结合区域地质背景,运用层序地层学、地震相分析等技术,对研究区沉积相与沉积演化进行分析,并阐述了其油气地质条件与勘探方向。结果表明,研究区上上新统沉积相类型以三角洲沉积为主,该时期经历了海侵-海退的变化,沉积层序表现为多期的前三角洲—三角洲前缘叠合体。沉积特征决定了该区上上新统生储盖组合配置良好,同时新构造运动有利于多种圈闭的发育。该区油气成藏条件较好,具有广阔的勘探前景。
In order to appraise the petroleum exploration potential and indicate the direction for further exploration in the area,the authors analyzed the sedimentary facies and sedimentary evolution and elaborated the petroleum geological conditions and exploration direction using the methods of sequence stratigraphy and seismic facies combined with the regional geologic background.The result showed that the sedimentary facies was delta mainly,and the sedimentary evolution experienced transgression-dereliction in upper Pliocene of this area.The sedimentary sequence showed superimposed predelta-delta front sediments.These depositional characteristics may lead to good source-reservoir-cap assemblage in this area,and the neotectonic activity is favorable to develop various traps.Therefore,this area is good in hydrocarbon accumulation conditions with great exploration potential.
In order to appraise the petroleum exploration potential and indicate the direction for further exploration in the area,the authors analyzed the sedimentary facies and sedimentary evolution and elaborated the petroleum geological conditions and exploration direction using the methods of sequence stratigraphy and seismic facies combined with the regional geologic background.The result showed that the sedimentary facies was delta mainly,and the sedimentary evolution experienced transgression-dereliction in upper Pliocene of this area.The sedimentary sequence showed superimposed predelta-delta front sediments.These depositional characteristics may lead to good source-reservoir-cap assemblage in this area,and the neotectonic activity is favorable to develop various traps.Therefore,this area is good in hydrocarbon accumulation conditions with great exploration potential.
引文
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[2]Rao P S,Ramaswamy V,Thwin S.Sediment texture,distribution and transport on the Ayeyarwady continentalshelf,Andaman Sea[J].Marine Geology,2005,216(4):239-247.
[3]朱光辉,谢晓军,邱春光.弧后走滑拉张盆地石油地质特征与油气勘探潜力—以缅甸Andaman海域马达班湾盆地为例[J].中国海上油气,2010,22(4):225-231.ZHU Guang-hui,XIE Xiao-jun,QIU Chun-guang.Petro-leum geology and exploration potential in back-arc strikeslip and extension basins:a case of Moattama Bay basinin Andaman sea,Myanmar[J].China Offshore Oil andGas,2010,22(4):225-231.
[4]李松,汤达祯,王炜,等.鄯勒油田西山窑组层序地层格架及其油气地质意义[J].吉林大学学报:地球科学版,2011,41(4):983-991.LI Song,TANG Da-zhen,WANG Wei,et al.Sequencestratigraphic framework and geological significance for pe-troleum of Xishanyao Formation in Shanle oilfield[J].Journal of Jilin University:Earth Science Edition,2011,41(4):983-991.
[5]曹瑞成,李军辉,卢双舫,等.海拉尔盆地呼和湖凹陷白垩系层序地层特征及沉积演化[J].吉林大学学报:地球科学版,2010,40(3):536-541.CAO Rui-cheng,LI Jun-hui,LU Shuang-fang,et al.Se-quence stratigraphic character and sedimentary evolutionin Cretaceous in Huhehu depression in Hailaer Basin[J].Journal of Jilin University:Earth Science Edition,2010,40(3):536-541.
[6]谢晓军,朱光辉,吕明.综合层序地层方法在缅甸某区块的应用[J].沉积与特提斯地质,2009,29(1):78-83.XIE Xiao-jun,ZHU Guang-hui,LMing.Applicationsof the sequence stratigraphic analysis to one explorationblock in Myanmar[J].Sedimentary Geology and Tethy-an Geology,2009,29(1):78-83.
[7]杨俊生,陈世悦,袁波.辽河西部凹陷欢喜岭地区沙河街组层序界面的识别[J].世界地质,2010,29(2):314-322.YANG Jun-sheng,CHEN Shi-yue,YUAN Bo.Identifica-tion of sequence boundary in Shahejie Formation of Hua-nxiling area in western Liaohe depression[J].GlobalGeology,2010,29(2):314-322.
[8]赵丽娜,陈建文,张银国,等.东海西湖凹陷平湖构造带平湖组沉积特征[J].世界地质,2008,27(1):42-47.ZHAO Li-na,CHEN Jian-wen,ZHANG Yin-guo,et al.Sedimentary characteristics of Pinghu Formation in Pinghustructural belt of Xihu depression,East China Sea[J].Global Geology,2008,27(1):42-47.
[9]刘春燕,王毅,胡宗全,等.鄂尔多斯盆地富县地区延长组沉积特征及物性分析[J].世界地质,2009,28(4):491-497.LIU Chun-yan,WANG Yi,HU Zong-quan,et al.Depo-sitional features and properties analysis of Yanchang For-mation in Fuxian area,Ordos Basin[J].Global Geolo-gy,2009,28(4):491-497.
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